20.10.2020Author: admin
Suppose a man can row a boat at a speed of r km/hr in still water and covers the same distance up and down in a stream while a stream flows at a speed of s km/hr. His average speed will be: A man rows downstream by covering a certain distance in p1 hours and returns the same distance upstream in p2 hours. If the speed of the stream is s km/hr. Aug 29, �� Example 5: A boat�s speed in still water is 10 km/h, while the river is flowing with a speed of 2 km/h and time taken to cover a certain distance upstream is 4 h more than the time taken to cover the same distance downstream, Find the distance? Hence, the ratio of speed of boat in still water and to the average speed of boat in downstream and upstream is New questions in Math x - 2y = 4 ; 2x - 4y = 8 represents.a.
if that�s the upstream speed nice and easy 11x = m/s is the downstream speed. if that�s the downstream speed then 11x = m/s is the upstream speed. If we are saying the speed of the boat in still water is 11km/h then the actual difference between upstream vs downstream travel is 20%. A good formula to start with would be. x = speed of river. iOS App | Android App. About GMAT Club. Blog.� If the upstream trip took half an hour longer than the downstream trip, how many hours did it take the boat to travel downstream? A) b) C) D) e) Given 90/(v-3) = 90/(v+3) + (1/2) 90[(1/(v-3)) - (1/(v+3))] = 1/2 90[6/(v^2 - 9)] = 1/2.� A boat travelled upstream a distance of 90 miles at an average speed of (v-3) miles per hour and then travelled downstream at an average speed of (V+3) miles per hour. If the trip upstream took half an hour longer than the trip downstream, how many hours did it take the boat to travel downstream? A) b) C) D) e) Speed downstream $=(x+3)$ kmph Speed upstream $=(x-3)$ kmph. He travels a certain distance downstream in 1 hour and come back in 11?2 hour. i.e., distance travelled downstream in 1 hour = distance travelled upstream in 11?2 hour. Since distance = speed ? time, we have $(x + 3) ?1 = (x - 3)\dfrac{3}{2}\\~\\\Rightarrow 2(x + 3) = 3(x-3)\\~\\\Rightarrow 2x + 6 = 3x - 9\\~\\\Rightarrow x = 6+9 = 15\text{ kmph}$. 9. A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream.� If the speed of the stream is 5 km/hr, find the time taken by the boat to go 54 km downstream. A. 3 hours. B. 2 hours.
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